<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>博客列表</title>
    <link rel="stylesheet" href="css/list.css">
    <link rel="stylesheet" href="css/blog_list.css">
    <style>
        
        .nav{
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 50px;
        }
        .container{
            padding-top: 80px;
            height: auto;
        }
        .container-right{
            width: auto;
        }
        .blog-pagnation-wrapper{
            height: 40px;
            margin: 16px 0;
            text-align: center;
        }
        .blog-pagnation-item{
            display: inline-block;
            padding: 8px;
            border: 1px solid #d0d0d5;
            color: #333;
        }
        .blog-pagnation-item:hover{
            background: #4e4eeb;
            color: #fff;
        }
        .blog-pagnation-item.actvie{
            background: #4e4eeb;
            color: #fff;
        }


    </style>
    <script src="js/jquery.min.js"></script>
    <script src="js/urltools.js"></script>
    <script src="js/sessiontools.js"></script>
</head>

<body>
    <!-- 导航栏 -->
    <div class="nav">
        <img src="img/logo2.jpg" alt="">
        <span class="title">我的博客系统</span>
        <!-- 用来占据中间位置 -->
        <span class="spacer"></span>
        <a href="blog_list.html">主页</a>
        <span id="userElement" style="display: none;">
            <a href="blog_add.html">写博客</a>
            <a href="javascript:logout()">注销</a>
        </span>
        
        <a id="loginElement" href="login.html">登陆</a>
        <!-- <a href="#">注销</a> -->
    </div>
    <!-- 版心 -->
    <div class="container">
        <!-- 右侧内容详情 -->
        <div  class="container-right" style="width: 100%;">
            <div id="artlist">
            </div>
            <hr>
            <div id="pageDiv" class="blog-pagnation-wrapper">
                <button class="blog-pagnation-item" onclick="doFirst()">首页</button> 
                <button class="blog-pagnation-item" onclick="doPre()">上一页</button>  
                <button class="blog-pagnation-item" onclick="doNext()">下一页</button>
                <button class="blog-pagnation-item" onclick="doLast()">末页</button>
            </div>
        </div>
    </div>
    <script>
        var pageIndex = 1;  // 当前页码
        var pageSize = 2; // 每页显示条数
        var pageCount = 1;// 总页数
        // 初始化参数
        function paramInit() {
            var paramPageIndex = getParamByKey("pageIndex");
            var paramPageSize = getParamByKey("pageSize");

            if(paramPageIndex != null) {
                pageIndex = paramPageIndex;
            }
            if(paramPageSize != null) {
                pageSize = paramPageSize;
            }
            doAjax();
        }
        paramInit()
        function doFirst() {
            if(pageIndex <= 1){
                alert("当前已经为首页");
                return false;
            }
            pageIndex=1;
            location.href = "blog_list.html?pageIndex="+pageIndex+"&pageSize="+pageSize;
        }
        // 点击上一页
        function doPre() {
            if(pageIndex <= 1){
                alert("已经在首页了,宝贝");
                return false;
            }
            pageIndex--;
            location.href = "blog_list.html?pageIndex="+pageIndex+"&pageSize="+pageSize;
        }
        // 点击下一页
        function doNext() {
            if(pageIndex >= pageCount){
                alert("宝贝就在末页了");
                return false;
            }
            pageIndex++;
            location.href = "blog_list.html?pageIndex="+pageIndex+"&pageSize="+pageSize;
        }
        // 跳到末页
        function doLast() {
            if(pageIndex >= pageCount){
                alert("宝贝就在末页了");
                return false;
            }
            location.href = "blog_list.html?pageIndex="+pageCount+"&pageSize="+pageSize;
        }
        // 请求后端 得到数据并展示列表
        function doAjax() {
            jQuery.ajax({
                url:"/art/getlistbypage",
                type:"POST",
                data: {
                    pageIndex: pageIndex,
                    pageSize: pageSize
                },
                success: function(res) {
                    if(res.code == 200 && res.data.length > 0){
                        // 后端查询到数据进行展示数据
                        var artListHtml = "";
                        for(var i = 0;i < res.data.length;i++){
                            var item = res.data[i];
                            artListHtml += '<div class="blog" >';
                            artListHtml += '<div class="title">' + item.title + '</div>';
                            artListHtml += '<div class="date">'+ item.createtime +'</div>';
                            artListHtml += '<div class="desc">'+ item.content + '</div>';
                            artListHtml += '<a href="blog_content.html?id='+item.id+'" class="detail">查看全文 &gt;&gt;</a>';
                            artListHtml += '</div>';
                        }
                        jQuery("#artlist").html(artListHtml);
                        jQuery("#pageDiv").show();
                    }else {
                        jQuery("#pageDiv").hide();
                        jQuery("#artlist").html("<h1>暂无文章</h1>");
                    }
                }
            });
            // 查询文章总条数
            jQuery.ajax({
                url:"/art/getcount",
                type:"POST",
                data: {},
                success: function(res) {
                    if(res.code == 200 && res.data > 0) {
                        // 计算总页数
                        pageCount = Math.ceil(res.data/pageSize);
                    }
                }
            });
        }
         // 判断用户是否登录
            function isLogin() {
                $.ajax({
                    url:"/user/islogin",
                    type:"POST",
                    data:{},
                    success:function(res){
                        if(res.code == 200 && res.data == 1){
                            // 已经登录
                            jQuery("#loginElement").hide(); // 隐藏
                            jQuery("#userElement").show(); // 显示
                        } else {
                            jQuery("#userElement").hide(); // 隐藏
                            jQuery("#loginElement").show(); // 显示
                        }
                    }
                });
            }
            isLogin();
    </script>
</body>
</html>